Improvement in domes for hot-air furnaces



Bl. G'OMNIENGINGER. Dome for Hot Air ifurnl'lace.`

Patented March r9, 1872;

mmmf

' I' Inv/22% v Mi WWU/2d 7J;

UNITED Sra'rns Parnnfr Grauen.

AlN'IPRVEl'VlENI'I IN DOMS FOR HOT-AIR FURNACES.

Specification forming part of Letters Patent No. 124,807, dated March19, 1872.

Specification describing a certain Improvement 1n -Itadiating-Domes forHot-Air Furnaces, invented by BARTHoLoMEw GOMMEN- cinema, of the city ofRochester, in the connty of Monroe and State of New York,

.Nature of the Invention.

h construction of the base of the dome, as hereinafter described.

General Description.

In the drawing, Figure 1 is a central vertical section of the dome; Fig.2, a longitudinal section in line :r Fig. l; Fig. 3, a perspective Viewof a portion ofthe ring Fig. 4, a view of one of the draught-inlets;Fig. 5, section of the baseof the dome.

A represents the dome, which may be made to surmount the fire-pot andbase of any ordinary hot-air furnace, B B are the combustionpipesleading from the rechamber to the dome; and C is the closed central coneor chamber, which holds a portion of the heat and products ofcombustion, and simply serves as a radiator, the same being in commonuse. The dome consists simply of an annular hollow chamber, beingcovered at the `top and bottom by the plates D D. The hollow space ofthis dome is divided into two compartments by a vertical annularpartition or divisionplate, E, which is in the form of a ring, open atbot-h ends, and extends from top to bottom, as shown. Thispartition-ring is loose, so that it may be turned around to anyposition, and it is operated by a socket-stem, a, which projects throughthe dome, or by any other desired means. The inlet-openings b b from thecombustion-pipes open centrally against the bottom of the partition-ring, so as to discharge equally into either of the compartments separatedby the ring. The base D, in which these inlets are located, is madeconvex upon the inner side, as shown at c c, the object being toallow-the ashes to slide off on either side, away rfrom the bottom ofthe partition-rin g, and thus prevent clogging. A hat space, however, isleft under the edge of the ring, so that it will keep in place and workeasily. The plate, directly under the edge of the ring, is alsoperforated at intervals by small holes d d, Fig. 5, to allow the escapeof such ashes as do gather under the ring| from long standing- Theseseveral features of the convex plate and the perforations form onefeature of my invention.

The bottom of the partition-ring is formed at its lower edge, outsideand inside, with halfcircular covers or capsfj', of size and shape tocorrespond with the half-circular inlet-openings b b of thecombustion-pipes, which they aremade to cover. They also stand in convexor arching form, tot the arch of the base-plate D. These covers, outsideand inside, are arranged to alternate or break joints, being l solocated that when one set covers the openings on one side the other setuncovers the openings on the other side, and vice versa. Thus theopenings on one side or the other are always open when the other set isclosed. The object of this is to give either a direct -or an indirectdraught, as may be desired.

When an indirect draught is to be produced, the holes in theouter'compartrnent are covered, as shown in the drawing;l and in thatcase the draught which enters the inner compartrnent passes through thepart g in the partition-ring into the outer one, and finally escapesinto the smoke-pipe h.

By the use of this partition-rin g damper the furnace is self -cleaningat all times, as the ashes that deposit are swept off by the turningaction. Thus the furnace is kept from iilling up, and it cannot leak gasor smoke.

I am aware that flat-ring dampers have been employed to cover theopenings in the same kind of drum, but these are objectionable, inasmuchas they lie ila-t and soon become obstructed by ashes. Separate ringshave also to be used for the several compartments. Such an arrangementis also complicated and eX- pensivew I make the central partition itselfserve as the damper to cover and uncover the holes. The whole being inone piece instead of three, it is much simpler and cheaper, therefore.Being upright, it cannot clog, especially when the base D is made of theconvex form shown, and the covers f f are made separated and detached.

My improvement greatly simplifies the construction of the furnace. I

A furnace constructed with this `dome can be set in sheet-iron casingsor in brick-Work, as desired.

Claim.

combined with the ring E and covers jf, in the manner and for thepurpose speoiiied.

3. I claim the ash-holes d in the plate D, combined with the ring E, inthe manner and for the purpose specified.

In Witness whereof I have hereunto signed my name in the presence of tWosubscribing Witnesses.

e B. GOMMENGINGER.

Witnesses:

R. F. OsGooD, ARCHD. BAINE.

